Preparation and using method of plant bionic high efficient adsorbent for removing difficult degradation organic pollutant

A technology for organic pollutants and plant biomimetic, which is applied in the field of plant biomimetic high-efficiency adsorbent preparation, and can solve the problems of high use cost, easy saturation, and small adsorption capacity.

Inactive Publication Date: 2007-10-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, activated carbon is mainly used for adsorption at home and abroad. Activated carbon has a good treatment effect on dissolved organic pollutants, but its adsorption mechanism is surface adsorption, the adsorption capacity is small, and it is easy to be saturated, resulting in high cost of use.
Organic bentonite has good adsorption performance and large adsorption capacity, and its application in the treatment of refractory organic wastewater has attracted great attention. There are related invention patents (invention patent number: ZL03116256.8); but the surfactant on organic bentonite is easy to Desorption makes it difficult to discharge COD in wastewater treatment up to the standard

Method used

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  • Preparation and using method of plant bionic high efficient adsorbent for removing difficult degradation organic pollutant

Examples

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Effect test

Embodiment 1

[0017] 1) Utilize the discarded plant epidermis, remove the pulp therein, obtain the plant epidermis, and obtain a natural waxy extract by the Soxhlet extraction method;

[0018] 2) mixing the waxy extract with natural clay minerals, the mass volume ratio of natural clay minerals and waxy extracts is 1:3, shaking at room temperature for 1 hour, and filtering;

[0019] 3) The filter cake was air-dried at room temperature, dried at 80° C. for 1 hour, ground, and sieved to 40 mesh to obtain a plant bionic high-efficiency adsorbent; the filtrate was recovered and reused.

Embodiment 2

[0021] 1) Utilize the discarded plant epidermis, remove the pulp therein, obtain the plant epidermis, and obtain a natural waxy extract by the Soxhlet extraction method;

[0022] 2) Mix the waxy extract with natural clay minerals, the mass volume ratio of natural clay minerals and waxy extract is 1:80, shake at room temperature for 6 hours, and filter;

[0023] 3) The filter cake was air-dried at room temperature, dried at 90° C. for 2 hours, ground, and sieved to 200 mesh to obtain a high-efficiency plant biomimetic adsorbent; the filtrate was recovered and reused.

Embodiment 3

[0025] Fresh apple peels were manually peeled, and after the peels were boiled in water for 1 h, as much pulp as possible was manually removed. It is then washed with distilled water to remove any remaining pulp and get a good amount of skin. The epidermis was extracted with a Soxhlet extractor at 70° C. for 6 h with a 1:1 organic solvent of chloroform and methanol to obtain a waxy component. After evaporation by rotary evaporator, it was allowed to dry naturally. Add 0-1.5g plant cuticle waxy sample and 30mL methanol to a 40mL sample bottle in sequence, and add a certain amount of calcium-based montmorillonite at the same time, shake it by hand to mix evenly, and shake it in a constant temperature oscillator for 6 hours at 25 °C±0.5°C. Blot up the supernatant as much as possible, place the sample in a fume hood to dry at room temperature, dry at 80-90°C for 2 hours, and grind through a 100-mesh sieve for later use. A high-efficiency plant biomimetic adsorbent is obtained, ...

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Abstract

An efficient bionic vegetative adsorbent for removing the organic pollutants difficult to be degradated from water is prepared through providing vegetative skin, extracting to obtain waxy liquid, proportionally mixing it with clay mineral, oscillating, filtering, drying the filtered cake in the air, baking, grinding and sieving. Its application method is also disclosed.

Description

technical field [0001] The invention relates to water treatment technology and application, in particular to a method for preparing and using a plant bionic high-efficiency adsorbent for removing refractory organic matter in water. Background technique [0002] Since the 1950s, the rapid development of the chemical industry has led to an increase in the types and quantities of artificially synthesized organic substances. Human beings have synthesized and produced 10 million chemicals, and more than 100,000 have entered the environment. Among them, persistent organic pollutants (POPs) are mostly carcinogenic, toxic and mutagenic, and widely exist in the air, water, sediment, soil and other environments, and are difficult to degrade in the environment, and can pass through the food chain. Transmitted and accumulated in organisms, it poses a serious threat to human health and the ecological environment. To this end, in 2001, representatives of 122 countries signed the famous ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/30B01J20/24B01J20/12C02F101/30
Inventor 陈宝梁周丹丹赵丽平
Owner ZHEJIANG UNIV
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